void au_cpup_attr_nlink(struct inode *inode, int force)
{
struct inode *h_inode;
struct super_block *sb;
aufs_bindex_t bindex, bend;
sb = inode->i_sb;
bindex = au_ibstart(inode);
h_inode = au_h_iptr(inode, bindex);
if (!force
&& !S_ISDIR(h_inode->i_mode)
&& au_opt_test(au_mntflags(sb), PLINK)
&& au_plink_test(inode))
return;
/*
* 0 can happen in revalidating.
* h_inode->i_mutex is not held, but it is harmless since once i_nlink
* reaches 0, it will never become positive.
*/
set_nlink(inode, h_inode->i_nlink);
/*
* fewer nlink makes find(1) noisy, but larger nlink doesn't.
* it may includes whplink directory.
*/
if (S_ISDIR(h_inode->i_mode)) {
bend = au_ibend(inode);
for (bindex++; bindex <= bend; bindex++) {
h_inode = au_h_iptr(inode, bindex);
if (h_inode)
au_add_nlink(inode, h_inode);
}
}
}
void au_cpup_attr_nlink(struct inode *inode, int force)
{
struct inode *h_inode;
struct super_block *sb;
aufs_bindex_t bindex, bend;
LKTRTrace("i%lu\n", inode->i_ino);
/* todo? IMustLock(inode); */
AuDebugOn(!inode->i_mode);
sb = inode->i_sb;
bindex = au_ibstart(inode);
h_inode = au_h_iptr(inode, bindex);
if (!force
&& !S_ISDIR(h_inode->i_mode)
&& au_opt_test(au_mntflags(sb), PLINK)
&& au_plink_test(sb, inode))
return;
inode->i_nlink = h_inode->i_nlink;
/*
* fewer nlink makes find(1) noisy, but larger nlink doesn't.
* it may includes whplink directory.
*/
if (S_ISDIR(h_inode->i_mode)) {
bend = au_ibend(inode);
for (bindex++; bindex <= bend; bindex++) {
h_inode = au_h_iptr(inode, bindex);
if (h_inode)
au_add_nlink(inode, h_inode);
}
}
}
void au_cpup_attr_nlink(struct inode *inode, int force)
{
struct inode *h_inode;
struct super_block *sb;
aufs_bindex_t bindex, bend;
sb = inode->i_sb;
bindex = au_ibstart(inode);
h_inode = au_h_iptr(inode, bindex);
if (!force
&& !S_ISDIR(h_inode->i_mode)
&& au_opt_test(au_mntflags(sb), PLINK)
&& au_plink_test(inode))
return;
/*
* 0 can happen in revalidating.
* h_inode->i_mutex may not be held here, but it is harmless since once
* i_nlink reaches 0, it will never become positive except O_TMPFILE
* case.
* todo: O_TMPFILE+linkat(AT_SYMLINK_FOLLOW) bypassing aufs may cause
* the incorrect link count.
*/
set_nlink(inode, h_inode->i_nlink);
/*
* fewer nlink makes find(1) noisy, but larger nlink doesn't.
* it may includes whplink directory.
*/
if (S_ISDIR(h_inode->i_mode)) {
bend = au_ibend(inode);
for (bindex++; bindex <= bend; bindex++) {
h_inode = au_h_iptr(inode, bindex);
if (h_inode)
au_add_nlink(inode, h_inode);
}
}
}
int au_br_add(struct super_block *sb, struct au_opt_add *add, int remount)
{
int err;
aufs_bindex_t bend, add_bindex;
struct dentry *root, *h_dentry;
struct inode *root_inode;
struct au_branch *add_branch;
root = sb->s_root;
root_inode = root->d_inode;
IMustLock(root_inode);
err = test_add(sb, add, remount);
if (unlikely(err < 0))
goto out;
if (err) {
err = 0;
goto out; /* success */
}
bend = au_sbend(sb);
add_branch = au_br_alloc(sb, bend + 2, add->perm);
err = PTR_ERR(add_branch);
if (IS_ERR(add_branch))
goto out;
err = au_br_init(add_branch, sb, add);
if (unlikely(err)) {
au_br_do_free(add_branch);
goto out;
}
add_bindex = add->bindex;
h_dentry = add->path.dentry;
if (!remount)
au_br_do_add(sb, h_dentry, add_branch, add_bindex);
else {
sysaufs_brs_del(sb, add_bindex);
au_br_do_add(sb, h_dentry, add_branch, add_bindex);
sysaufs_brs_add(sb, add_bindex);
}
if (!add_bindex) {
au_cpup_attr_all(root_inode, /*force*/1);
sb->s_maxbytes = h_dentry->d_sb->s_maxbytes;
} else
au_add_nlink(root_inode, h_dentry->d_inode);
/*
* this test/set prevents aufs from handling unnecesary notify events
* of xino files, in case of re-adding a writable branch which was
* once detached from aufs.
*/
if (au_xino_brid(sb) < 0
&& au_br_writable(add_branch->br_perm)
&& !au_test_fs_bad_xino(h_dentry->d_sb)
&& add_branch->br_xino.xi_file
&& add_branch->br_xino.xi_file->f_dentry->d_parent == h_dentry)
au_xino_brid_set(sb, add_branch->br_id);
out:
return err;
}
